/*
 * Copyright 2010-2016 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.uast.kotlin

import com.intellij.psi.PsiElement
import com.intellij.psi.PsiNamedElement
import com.intellij.psi.ResolveResult
import org.jetbrains.kotlin.kdoc.psi.impl.KDocName
import org.jetbrains.kotlin.psi.KtDotQualifiedExpression
import org.jetbrains.uast.*
import org.jetbrains.uast.kotlin.internal.DelegatedMultiResolve
import org.jetbrains.uast.kotlin.internal.multiResolveResults

class KotlinUQualifiedReferenceExpression(
        override val sourcePsi: KtDotQualifiedExpression,
        givenParent: UElement?
) : KotlinAbstractUExpression(givenParent), UQualifiedReferenceExpression, DelegatedMultiResolve,
        KotlinUElementWithType, KotlinEvaluatableUElement {
    override val receiver by lz { KotlinConverter.convertOrEmpty(sourcePsi.receiverExpression, this) }
    override val selector by lz { KotlinConverter.convertOrEmpty(sourcePsi.selectorExpression, this) }
    override val accessType = UastQualifiedExpressionAccessType.SIMPLE

    override fun resolve(): PsiElement? = sourcePsi.selectorExpression?.let { resolveToDeclaration(it) }

    override val resolvedName: String?
        get() = (resolve() as? PsiNamedElement)?.name

    override val referenceNameElement: UElement?
        get() = when (val selector = selector) {
            is UCallExpression -> selector.methodIdentifier
            else -> super.referenceNameElement
        }
}


class KotlinDocUQualifiedReferenceExpression(
    override val sourcePsi: KDocName,
    givenParent: UElement?
) : KotlinAbstractUExpression(givenParent), UQualifiedReferenceExpression, UMultiResolvable {

    override val receiver by lz {
        KotlinConverter.convertPsiElement(sourcePsi, givenParent, DEFAULT_EXPRESSION_TYPES_LIST)
                as? UExpression ?: UastEmptyExpression(givenParent)
    }
    override val selector by lz {
        createKDocNameSimpleNameReference(parentKDocName = sourcePsi, givenParent = this) ?: UastEmptyExpression(this)
    }
    override val accessType = UastQualifiedExpressionAccessType.SIMPLE

    override fun resolve(): PsiElement? = sourcePsi.reference?.resolve()

    override val resolvedName: String?
        get() = (resolve() as? PsiNamedElement)?.name

    override fun multiResolve(): Iterable<ResolveResult> = sourcePsi.multiResolveResults().asIterable()
}